Lock



31m MJQZQ. M. LEVEN'THAL l,7l7.930

LOCK Filed June 16, 1928 INVENTOR By Attorney Patented June 18, 1929.

MITGHELL LEVENTHAL, OF BROOKLYN,

NEW YORK, ASSIGNOR T0 SOSY, INQ, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

LOCK.

Application filed June 16, 1928. Serial No. 285,843.

The present invention relates to looks, and more particularly to suit-case locks of the spring pressed draw-bolt type, and aims to provide certain improvements therein.

Heretofore in looks of the type to which the present invention relates the lock mecha nism at the rear of the cover plate was of substantial thickness which necessitated grooving or cutting an opening in the member to which the look was fitted in order to icconnnodate said lock mechanism. To avoid this grooving or cutting operation it had been heretofore proposed to form the cover plate with a deep flange about its perimeter to completely house the lock mechanism, but this practice was found objectionable because it rendered the lock too thick and unsightly.

According to the present invention I provide a lock wherein the lock mechanism at the rear of the cover plate contains not more than two superposed thicknesses of material, which double thickness is of less depth than that of the cover plate flange. In this manner all need for grooving and cutting away of the lock receiving member is obviated. 7

According to the present invention I provide a lock of the type described which is eX- ceedingly simple and sturdy in construction and which admirably lends itself to mass production. The invention also contemplates and embodies other features of novelty which will be hereinafter more fully described.

A preferred embodiment of my invention is illustrated in the accompanying drawings, wherein:

Figure 1 is a top plan view of a lock embodying my invention.

Fig. 2 is a bottom plan view of the lock.

Fig. 3 is an enlarged longitudinal section taken substantially along the plane of the line 33 of Fig. f

Fig. 4c is a section taken substantially along the planes of the line lt of Fig. 3.

Fig. 5 is a top plan view of the drawbolt.

Fig. 6 is a section substantially along the planes of the line 66 of Fig. 5.

Fig.7 is a perspective view of the tumbler.

Referring to the drawings, let A indicate the lock as a whole and B any form of hasp adapted to be used therewith. The look A may be said to consist of the following princlpal elements: a cover plate C, a draw -bolt D, a tumbler E, a rear plate F and an escutcheon G.

The cover plate C may be of any size and outline and is preferably of substantially flat form provided about its perimeter with a rearwardly directed continuous flange a. In its face it is provided with a. hasp opening c, a second opening 0 and corner openings 0* through which rivets for securing the look upon a supporting member may be passed.

The draw-bolt D is preferably formed from a flat piece of metal and is adapted to slide against the back of the cover plate. In outline it is substantially of rectangular form and is provided at one edge with a centrally projecting tongue d. Within its body portion it is provided with a recess 03" for accommodating the tumbler E and within which said tumbler is adapted for limited movement. One edge of the recess a? is provided with a cam projection adapted for cooperative engagement with a cam face 0 on the tumbler E. To the left of the recess (1? the draw-bolt is provided with a raised or struck-up substantially circular portion 6Z3 having a central opening cl therein. The function of said struck-up portion (i and opening a is to accommodate the end of a key H and provide a stop for cooperation with the bit of the key to limit its insertion int-othe lock. The draw-bolt D is also provided with a pair of longitudinally extending openingscl through which depending lips or lugs g on the opposite sides of the escutcheon G-6XtOIlCl and have their protruding ends twisted, as best shown in Figs.

2 and 4, so as to prevent separation of said members. In this manner the escutcheon G is carried by the draw-bolt D and is movable therewith as a unit. For normally urging the draw-bolt into latching position a flat spring if having one end thereof fixed in a recess in the draw-bolt is provided, which spring in the assembled. lock abuts againsta shoulder f on the rear plate F. Obviously any other form of spring or other method of holding the same may be substituted for that just described.

The tumbler E as herein shown is formed of a tla-t piece of metal of substantially the same thickness as that of the draw-bolt and is positioned within the recess cl in the draw-bolt to lie within the face planes there of. As previously stated, said tumbler is provided with a cam surface 6 for coperative engagement with a cam (Z For holding said cam surfaces on the tumbler and on the draw-bolt in engagement, the tumbler is provided with a flat spring 6 held in substantially the same manner as the spring cl or in any other manner, the spring engaging against one edge of the recess and being held under compression. At one end the tumbler is formed with a recess or rabbet e for cooperative engagement with an abutment f struck-up from the face of the rear plate F and projecting into one corner of the recess d. For moving the tumbler into and out of locking engagement with said abutment f, the tumbler is formed at one edge with a V-shaped recess 6 in which the bit it of the key H is adapted to engage, rotary movement of the key being capable of moving the tumbler to the right or left. For providing a clearance for the bit 71, during its turning movement the cover plate is bent outwardly as best shown at c in Fig. 3.

The rear plate F fits within the flanged perimeter of the cover plate and has a flat portion 7? which seats flush against the back of said cover plate and a central substantially rectangular raised or struck-up portion i the inner side walls of which are adapted to guide, and the inner end walls of which limit the movement of the draw-bolt D. The

end wall of the struck-up portion which overlies the tongue cl is cutaway to accommodate said tongue and provide a guide therefor. The depth of said struck-up portion is just sufficient to clear the top faces of the draw-bolt and the tumbler and thus maintain them in proper operative position. The free end of the spring (Z abuts against the wall fof the struck-up portion and being under compression normally urges the drawbolt into latching position.

The rear plate F is provided in its portion f with two openings f and 7, the former serving for the insertion of a suitable tool for engaging the spring d to move it into place, and the latter being a clearance opening at the rear of opening a for permitting movement of the tongue d and the reception of the tongue engaging element of the hasp (not shown). In order to avoid an additional thickness of metal at the rear of the cover plate the struck-up portion of the rear plate is formed with an opening 7 through which the struck-up portion d and the twisted lugs g extend. The rear plate F has an outline which insures it against lateral movement with respect to the cover plate and it is held flush against the back of said cover plate through the medium of lips c bent down thereover, said lips being integral with the flange 0.

The escutcheon G may be of any desired configuration and is preferably in the form of a stamped or drawn boxing having an outline similar to that of the cover plate G adapted to provide a suitable finger en.-

gagement for moving the draw-bolt rearwardly against the tension of spring d. It is of a size to provide a closing for the opening 0 in the cover plate and has its inner edges seating against the outer face of the cover plate and slidable thereon through a range limited by the range of movement of the drawbolt. As is conven-' tional the escutcheon is provided with a key opening to accommodate the key H.

While I have shown and described a preferred embodiment of my invention it will be understood that I do not wish to be limited to the specific details of construction disclosed, since various modifications thereof may be resorted to without departing from the spirit of the invention.

What I claim is:

1. A lock comprising a flat draw-bolt having a recess therein, a tumbler within said recess, said tumbler and draw-bolt having cooperating cam surfaces, and spring means acting to hold said parts with their cam surfaces in engagement. 7

2. A lock comprising a cover plate, a flat draw-bolt having a recess therein slidable against the back of the cover plate, a flat tumbler within said recess, said tumbler and draw-bolt having cooperating cam surfaces, spring means acting to hold said cam surfaces in engagement, a rear plate which together with the cover plate provide a housing and guide for the draw-bolt, a spring acting upon said draw-bolt urging it into latching position and an abutment on the housing extending into the recess in the draw-bolt adapted to cooperate with the tumbler to lock the draw-bolt in latching position.

3. A lock comprising a cover plate, a flat draw-bolt, a flat tumbler lying within the face planes of the draw-bolt, the draw-bolt and the tumbler being slidable as a unit against the back of the cover plate, and a rear plate having a portion lying against the back of the cover plate and a portion raised toengage over the draw-bolt and the tumbler to hold said parts in operative position.

4:. A look comprising a cover plate, a flat draw-bolt, a flat tumbler lying within the face planes of the draw-bolt, the draw-bolt and the tumbler being slidable against the back of the cover plate, a fixedly held rear position, and means on the rear plate overplate seating against the back of the cover lying the draw-bolt and the tumbler to hold plate having a recess encompassing the drawsaid parts in sliding contact With the back 10 bolt and providing a guide and limiting of the cover plate.

5 shoulders therefor, a spring between one of In Witness whereof, I have hereunto signed said shoulders and the draw-bolt normally my name. urging the tongue of the latter into'latching MITCHELL LEVENTHAL. 

